code_saturne User's Forum

Hello
I am trying to do a coupling between syrthes and 2 fluid domains Neptune to study the heat transfer between a fluidized bed and a water cooled tube. The coupling with 1 fluid domain at a time works well but when I try it with 2 fluid domains I get this error in the 1st fluid listing :
SIGTERM signal (termination) received.
--> computation interrupted by environment.

Call stack:
1: 0x2b3c0728ee65 <ompi_request_default_wait+0x55> (libmpi.so.1)
2: 0x2b3c072b01a6 <PMPI_Intercomm_create+0x206> (libmpi.so.1)
3: 0x2b3c065d62ca <ple_coupling_mpi_intracomm_create+0xda> (libple.so.1)
4: 0x2b3c04011477 <cs_syr4_coupling_init_comm+0x1c7> (libsaturne.so.0)
5: 0x2b3c04013e29 <cs_syr_coupling_all_init+0x879> (libsaturne.so.0)
6: 0x2b3c03b95fbb <_ZN11Neptune_CFD12TimeStepping4initEv+0x12b> (libneptune.so.0)
7: 0x2b3c0395218e <main+0x6e> (libneptune.so.0)
8: 0x2b3c05a03f45 <__libc_start_main+0xf5> (libc.so.6)
9: 0x400c59 <> (nc_solver)
End of stack

and pretty much the same in the 2nd fluid listing :
SIGTERM signal (termination) received.
--> computation interrupted by environment.

Call stack:
1: 0x2b329ef40f64 <opal_progress+0x14> (libopen-pal.so.6)
2: 0x2b329d854e65 <ompi_request_default_wait+0x55> (libmpi.so.1)
3: 0x2b329d8761a6 <PMPI_Intercomm_create+0x206> (libmpi.so.1)
4: 0x2b329cb9c2ca <ple_coupling_mpi_intracomm_create+0xda> (libple.so.1)
5: 0x2b329a5d7477 <cs_syr4_coupling_init_comm+0x1c7> (libsaturne.so.0)
6: 0x2b329a5d9e29 <cs_syr_coupling_all_init+0x879> (libsaturne.so.0)
7: 0x2b329a15bfbb <_ZN11Neptune_CFD12TimeStepping4initEv+0x12b> (libneptune.so.0)
8: 0x2b3299f1818e <main+0x6e> (libneptune.so.0)
9: 0x2b329bfc9f45 <__libc_start_main+0xf5> (libc.so.6)
10: 0x400899 <> (nc_solver)
End of stack

Does anyone have an idea how to get through this?
Any help would be greatly appreciated.

Fatima

I forgot to add that in the syrthes.log I have :
CFD COUPLING INITIALIZATIONS
============================

Cfd struct
app_num: -1
name: solide
do_coupling: 1
coupl_surf : 1
coupl_vol : 0
n_couplings: 1
NEPTUNE_CFD
I think syrthes reads only one coupled surface not 2 but I don't know why?
Fatima

Hello,

Did you define 2 separate couplings under Syrthes ? (you must define 2 couplings, not one with 2 zones).

Regards,

Yvan

Yes, I defined 2 couplings with Neptune_cfd with 2 different references but it doesn't work. It still reads only one coupling in the syrthes.log file.

Fatima

I actually think that the problem is with the 2 fluid domains not with syrthes, but I still can't figure out how to get through it?
Fatima

Hello,

This is strange, as it seems Syrthes only tries to couple with one CFD instance. Coupling one instance of Syrthes with 2 instances of Code_Saturne or NEPTUNE_CFD is not used very often, but it is used occasionally, and should work, though I remermer there may be some sutle aspects to the definition under Syrthes.

Could you post the setup files also (xml files for NEPTTUNE_CFD, .syd file for Syrthes) ?

Regards,

Yvan

Hello,
Thank you for your reply.
Here are the files of neptune and syrthes.
The extension .syd is not allowed so I attached the file with the extension .odt
Thank you for your help.
Fatima

Hello,

The setup files seem OK at first glance.

Could you post your fluid "listing" files, as well as the coupling_parameters.py file from the SCRIPTS directory ?

Regards,

Yvan

Hello,
here are the fluid listings and the coupling parameters file.
thank you for your help.
Fatima

Hello,

OK, the initialization part seems OK, so It seems the problem is really with Syrthes not seeing the multiple couplings, which is strange.

I'll try to run a similar setup with Code_Saturne to check the Syrthes (.syd) syntax, but I may not have time to do it before a few days...

Regards,

Yvan